- https://search.google.com/structured-data/testing-tool
- https://developers.facebook.com/tools/debug/
- https://cards-dev.twitter.com/validator
- https://developers.pinterest.com/tools/url-debugger/
- https://www.linkedin.com/post-inspector/
- https://www.coolseotools.com/open-graph-tester/output
OG Documentation
- http://ogp.me/
- https://ahrefs.com/blog/open-graph-meta-tags/
- https://moz.com/blog/meta-data-templates-123
- https://developers.facebook.com/docs/reference/opengraph
- https://dev.twitter.com/cards/types
- https://developers.pinterest.com/docs/rich-pins/overview/
- https://developer.linkedin.com/docs/share-on-linkedin